CombineFuturesExample.java

    private static CompletableFuture<String> futureCall1(){
        return CompletableFuture.supplyAsync(() -> {
            try {
                Thread.sleep(1000);
            } catch (Exception e) {
                System.out.print("exception occurred");
            }
            return "Hello";
        });
    }


    private static CompletableFuture<String> futureCall2(){
        return CompletableFuture.supplyAsync(() -> {
            try {
                Thread.sleep(2000);
            } catch (Exception e) {
                System.out.print("exception occurred");
            }
            return "World";
        });
    }



    private static void combineFuturesExample(){
        CompletableFuture<String> combinedFuture = futureCall1()
                .thenCombine(futureCall2(),(string1,string2)-> string1 + " " + string2);
        try {
            System.out.print(combinedFuture.get());
        } catch (Exception e) {
            System.out.print("exception occurred");
        }
    }